Truck crane capacities are usually greater over which quadrant?

Truck crane capacities are typically greater over the rear quadrant due to design and structural factors that enhance stability and load distribution. When lifting loads, the crane's center of gravity shifts, and having a stronger capacity to the rear helps prevent tipping and maintain balance. This is particularly important because the truck's solid frame and the rear axle can better handle the stresses involved in heavy lifting.

The rear quadrant allows for better leverage as the crane has a more stable base from which to operate. Additionally, many truck cranes are designed with counterweights positioned toward the rear to aid in stabilizing heavy lifts, thereby maximizing capacity in that quadrant.

Load charts are generally calibrated with this in mind, indicating greater safe lifting capacities when the load is positioned directly over the rear. Thus, choosing the rear quadrant for heavier lifts ensures both safety and efficiency in crane operations.